Mounting for replaceable gas burner



17968 E. E. HIRSCHBERG ET AL 3,407,023

MOUNTING FOR REPLACEABLE GAS BURNER Filed Jan. 5, 1967 a \fi Z I y" I!39 mammwmm WW (Show linmhl United States Patent 01 ice 3,407,023MOUNTING FOR REPLACEABLE GAS BURNER Erwin E. Hirschberg and Edward E.Moore, Rockford,

Ill., assignors to Eclipse Fuel Engineering Co., Rockford, Ill., acorporation of Illinois Filed Jan. 5, 1967, Ser. No. 607,571 6 Claims.(Cl. 431-328) The primary object of this invention is to provide for ahollow gas burner head a new and improved mounting which permits ofconvenient and low cost replacement of the burner head in service use.

Another object is to secure the burner head detachably to its mountingby the use of a tubular clamping element through which combustible gasis conducted into the burner.

A further object is to utilize the clamping tube as part of a simpleflow regulating valve adjustable selectively from the exterior of thehead and its mounting.

The invention also resides in the novel construction and arrangement ofthe parts of the regulating valve.

Other objects and advantages of the invention will become apparent fromthe following detailed description taken in connection with theaccompanying drawings, in which- FIGURE 1 is a side elevational view ofa burner head and the improved mounting with parts broken away and shownin section.

FIG. 2 is an exploded perspective view.

FIG. 3 is a fragmentary section taken along the line 3-3 of FIG. 1.

The invention is especially adapted for use in a gas burner in which anair-gas mixture is delivered through a hollow head closed on one side bya generally flat plate 11 having transversely extending pores or finepassages 12 through which the gas mixture is forced and burns at theouter surface of the plate. In so-called infrared burners, the plate isusually rectangular and most commonly composed of a porous layer ofsilicon carbide.

The flame plate 11 covers the open side of a hollow dish-shaped casingor manifold 14, which is an iron casting, and forms with the plate theself-contained burner head 10. Herein, the periphery of the plate isseated in an internally recessed and shouldered flange 15 of the casingand is secured thereto by cement 16 or other suitable means. Toaccelerate the development of the desired radiant heat, a screen 13 of asuitable alloy is disposed a short distance in front of the burner faceand suitably supported from the burner head flange 15.

The bottom of the casing converges from. the flange to a central tubularhub 17 defining an opening 18 through which 'an air-gas mixture isdelivered under pressure from a chamber 19 into the burner chamber 20.The chamber 19 is disposed between spaced walls 21 and 22 of a boxlikerectangular casing 23 closed at the sides and having openings 24 atopposite ends within flanges 25. The gas mixture is supplied to thechamber 19 through a pipe (not shown) coupled to one of the flanges andusually constituting the support for the burner assembly resulting fromclamping the casings 14 and 23 together. The other flange may be coveredby a plate or coupled to another pipe for conducting the gas to orreceiving gas through one or more other interconnected burner units. Thewall 21 of the casing 23 is flat and formed at the center with anoutwardly opening recess 28 in which the outer end of the hub 17 of theburner head is seated in the final assembly. The head is thus centeredon the casing 23.

-In accordance with the present invention, the burner head is secureddetachably to the casing wall 21 (FIG. 1) by a clam-ping element whichtakes the form of a tube 30 constructed and arranged in the burner headmounting so as to perform additional functions including con- 3,407,023Patented Oct. 22, 1968 ducting gas from the chamber 19 to the burnerhead while preserving the ready replaceability of the burner head. Forthis purpose, the tube is cylindrical and long enough to extend throughalined holes 31 in the casing walls 21 and 22 and the hole through thehub 17 which becomes alined with these holes when seated in the recess28 as shown in FIG. 1. Preferably, the clamping action is effected by athreaded coupling comprising a thread 32.around the inner end portion ofthe tube mating with an internal thread in the hub 17. A head 33 ofpolygonal shape is formed on the outer end of the tube and adapted to beturned to screw the tube into the hub, the manifold and burner headcasings becoming clamped together rigidly when the head comes intoabutment with a gasket 34 backed by the wall 22 and a gasket 35 comesbetween the hub 17 and the bottom of the recess 28.

Gas from the sup-ply chamber 19 is admitted to the tube 30 through oneor more holes 36 formed in and angularly spaced around the tube betweenthe walls 21 and 22 of this chamber. The gas flows inwardly along thetube and is delivered into the burner head through one or more holes 37in an end portion 38 of the tube projecting beyond the hub 17 into thechamber 20. By closing the end of the tube at 39 and employing a seriesof holes angularly spaced around the tube, the gas mixture isdistributed more evenly to the passages across the back of the burnerplate 11.

In gas burners of the above character, it is frequently desirable toadjust the rate of flow of the gas mixture to the burner head. To thisend, the clamping and gas conducting tube 30 constructed and mounted asabove described is utilized as part of a valve 40 of very simpleconstruction forming a permanent part of the detachable mounting for theburner head and easily adjustable from the exterior of the manifoldcasing 23 while the burner head is secured to this casing. Herein, themovable part of the valve comprises a plug 41 telescoped into the outerend portion of the tube 30 and adapted for adjustment of its inner end42 back and forth across the holes 36. Preferably, the plug is a screwthreaded into the tube with a slot 43 in its head exposed at or throughthe outer end of the tube after removal of a headed cap 44 also threadedinto the outer end of the tube. By turning the screw head in oppositedirections, the plug 41 may be advanced or retracted in the tube thusuncovering any selected part of the area of the holes 36 tocorrespondingly change the supply of gas to the burner head.

When it is desired to remove and replace the burner head 14, the tubehead 33 is turned to retract the inner end of the tube out of the hub 17thus releasing the burner head for convenient removal as a unit from itsmounting. A new head may then be placed against and centered on thecasing wall and the tube 30 screwed back into the hub thus clamping thenew burner head to the casing. During such replacement, the setting ofthe valve 46 is not disturbed since the axial position of the plunger 41is disposed within the tube and forms therewith a self-contained valveunit.

We claim as our invention:

1. A gas burner having, in combination, a casing defining a chamber forreceiving a combustible gas mixture and having spaced walls with alinedholes extending therethrough, a burner head having a back wall abuttingone of said first walls around one of said holes and having aninternally threaded hole smaller than and alined with the latter hole,said head having a chamber covered by a wall with passages therethroughfor passing said mixture for combustion, a tube extending through saidfirst holes and having a head at its outer end abutting said casing,means operable in response to turning of said tube relative to saidcasing to clamp said casing and said head into sealed abutment, whilepermitting removal of said head by turning and retracting said tube, andholes in said tube establishing communication between the tube and saidcasing chamber within the latter and between said tube and head chamberwithin the latter.

2. A gas burner assembly as defined in claim 1 in which the clamping ofsaid burner head to said casing is effected by a threaded connectionbetween said burner head and said tube.

3. A gas burner assembly as defined in claim 1 in which said burner headand casing are centered relative to each other by telescoping of partson the two.

4. A gas burner assembly as defined in claim 1 including a plungerdisposed in and closing the outer end of said tube and adjustable alongthe latter to vary 'the area of communication between said tube and saidcasing chamber and therefore the flow of gas to said burner head.

5. A gas burner assembly as defined in claim 4 in which said plunger isa screw threaded into the outer end portion of said tube.

6. A gas burner having, in combination, a casing defining a chamber forreceiving a gas mixture and having spaced walls with alined holesextending therethrough, a hollow burner head having a back wall abuttingone of said first walls around one of said holes and having aninternally threaded hole alined with the latter hole, said head having afront wall with passages therethrough for passing said mixture forcombustion at the outer face of the wall, a tube extending through saidfirst holes and having a head at its outer end abutting said casing andthreaded at its inner end into said threaded hole to clamp said casingand said head in sealed abutment, while permitting removal of said headby turning and retracting said tube, said tube communicating at itsinner end with the interior of said burner head a valve hole in saidtube communicating with said chamber, a valve member threaded into theouter end of said tube and projecting along the latter to dispose itsinner end adjacent said valve hole, and means by which the outer end ofsaid member may be gripped and turned to advance or retract the memberand change the uncovered area of said valve hole.

References Cited UNITED STATES PATENTS 678,624 7/1901 McKallip 239-553XR 2,302,751 11/1942 Howe 158-104 3,199,570 8/1965 Williams et a1.158-113 XR 3,136,354 6/1964 Fitzgerald 158104 XR FREDERICK L. MATTESON,JR., Primary Examiner.

H. B. RAMEY, Assistant Examiner.

1. A GAS BURNER HAVING IN COMBINATION, A CASING DEFINING A CHAMBER FORRECEIVING A COMBUSTIBLE GAS MIXTURE AND HAVING SPACED WALLS WITH ALINEDHOLES EXTENDING THERETHROUGH, A BURNER HEAD HAVING A BACK WALL ABUTTINGONE OF SAID FIRST WALL AROUND ONE OF SAID HOLES AND HAVING AN INTERNALLYTHREADED HOLE SMALLER THAN AND ALINED WITH THE LATTER HOLE, SAID HEADHAVING A CHAMBER COVERED BY A WALL WITH PASSAGES THERETHROUGH FORPASSING SAID MIXTURE FOR COMBUSTION, A TUBE EXTENDING THROUGH SAID FIRSTHOLES AND HAVING A HEAD AT ITS OUTER END ABUTTING SAID CASING, MEANSOPERABLE IN RESPONSE TO TURNING OF SAID TUBE RELATIVE TO SAID CASING TOCLAMP SAID CASING AND SAID HEAD INTO SEALED ABUTMENT, WHILE PERMITTINGREMOVAL OF SAID HEAD BY TURNING AND RETRACTING SAID TUBE, AND HOLES INSAID TUBE ESTABLISHING COMMUNICATION BETWEEN THE TUBE AND SAID CASINGCHAMBER WITHIN THE LATTER AND BETWEEN SAID TUBE AND HEAD CHAMBER WITHINTHE LATTER.